DIY Student Learning Sound-activated Sound Level Control LED Lamp Kit 3-5.5v

Working voltage: 3-5.5V
PCB: FR-4 a glass fiber board
Board size: 3CM*2.3CM 
Function: 5 LEDs will flash with the rhythm of music 
How it works:
This kit includes power circuit, microphone amplifier circuit and led circuit
Power supply from the J1 input, C1 filter for the circuit.MIC1 will transfer sound
signal into electrical signal,then go through C2, Q1 to amplifier signal. Then go to Q2, driven by the Q2
the 5 led will flash. The louder the sounder, the brighter the led

Package Included:
1 X Voice Control LED Lamp Kit